﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using System.Web.Security;
using FollowPeers.Models;
using System.Net.Mail;
using System.Net;
using System.Text;
using System.Security.Cryptography;
using System.Data;
using System.Data.Entity;
using System.Globalization;

namespace FollowPeers.Controllers
{
    public class AccountController : Controller
    {
        FollowPeersDBEntities followPeersDB = new FollowPeersDBEntities();

        //
        // GET: /Account/LogOn

        public ActionResult LogOn()
        {
            return View();
        }

        //
        // POST: /Account/LogOn

        [HttpPost]
        public ActionResult LogOn(LogOnModel model, string returnUrl)
        {
            if (ModelState.IsValid)
            {
                if (Membership.ValidateUser(model.UserName, model.Password))
                {
                    Session.Add("username",model.UserName);
                    ViewData["link"] = Session["username"].ToString();
                    FormsAuthentication.SetAuthCookie(model.UserName, model.RememberMe);
                    if (Url.IsLocalUrl(returnUrl) && returnUrl.Length > 1 && returnUrl.StartsWith("/")
                        && !returnUrl.StartsWith("//") && !returnUrl.StartsWith("/\\"))
                    {
                        return Redirect(returnUrl);
                    }
                    else
                    {
                        return RedirectToAction("Index", "Home");
                    }
                }
                else
                {
                    ModelState.AddModelError("", "The user name or password provided is incorrect.");
                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }

        //
        // GET: /Account/LogOff

        public ActionResult LogOff()
        {
            FormsAuthentication.SignOut();

            return RedirectToAction("Index", "Home");
        }


        public static string CalculateMD5Hash(string strInput)
        {
            MD5 md5 = System.Security.Cryptography.MD5.Create();
            byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(strInput);
            byte[] hash = md5.ComputeHash(inputBytes);

            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < hash.Length; i++)
            {
                sb.Append(hash[i].ToString("x2"));
            }
            return sb.ToString();
        }
        public ActionResult Verify(string code, string email)
        {
            if (code == CalculateMD5Hash(email + "followpeers"))
            {
                FormsAuthentication.SetAuthCookie(email, false /* createPersistentCookie */);
                UserProfile myprofile = followPeersDB.UserProfiles.SingleOrDefault(p => p.UserName == email);
                if (myprofile != null)
                {
                    myprofile.activated = true;
                    followPeersDB.Entry(myprofile).State = EntityState.Modified;
                    followPeersDB.SaveChanges();
                }
                return RedirectToAction("Index", "Profile", new { id = email });
            }
            else
            {
                return RedirectToAction("Index", "Home");
            }
        }



        //
        // GET: /Account/Register

        public ActionResult Register()
        {
            return View();
        }

        //
        // POST: /Account/Register

        [HttpPost]
        public ActionResult Register(RegisterModel model)
        {
            if (ModelState.IsValid)
            {
                // Attempt to register the user
                MembershipCreateStatus createStatus;
                //changed from model.UserName to model.Email of parameter 1
                Membership.CreateUser(model.Email, model.Password, model.Email, "question", "answer", true, null, out createStatus);

                if (createStatus == MembershipCreateStatus.Success)
                {
                    FormsAuthentication.SetAuthCookie(model.Email, false /* createPersistentCookie */);
                    string authorizationCode = CalculateMD5Hash(model.Email + "followpeers");
                    string messagetosend = "<a href='http://localhost:9832/Account/Verify?code=" + authorizationCode + "&email=" + model.Email + "'>Click to verify your account</a>";

                    /*     MailMessage message = new MailMessage("followpeers@isp.c0m", "ppp@nus.edu.sg", "Testing", messagetosend);
                         SmtpClient smtpClient = new SmtpClient();
                         smtpClient.UseDefaultCredentials = false;
                         smtpClient.Host = "smtp.gmail.com";
                         smtpClient.Port = 587;
                         smtpClient.Credentials = new NetworkCredential("followpeers@gmail.com", "followpeers123!");
                         smtpClient.EnableSsl = true;
                         smtpClient.Send(message);
                     * */
                    //System.Data.Entity.Database.SetInitializer(new SampleData());
                    CultureInfo provider = CultureInfo.InvariantCulture;
                    UserProfile myprofile = new UserProfile
                    {
                        UserName = model.Email.Trim(),
                        FirstName = model.FirstName,
                        LastName = model.LastName,
                        Profession = model.Profession,
                        activated = true,
                        firsttime = true,
                        Default = 2,
                        PhotoUrl = "/Content/TempImages/default.jpg",
                        Specializations = new List<Specialization>(),
                        Tiers = new List<Tier>(),
                        Keywords = new List<Keyword>(),
                        Contact = new Contact()

                    };
                    //myprofile.UserName = model.Email;
                    //   myprofile.UserName.Replace(" ", string.Empty);
                    myprofile.UserName.Trim();
                    myprofile.Tiers.Add(new Tier { Level = 1, Email = 1, Phone = 0, Mobile = 0, Address = 0, Education = 1, Publication = 1, Patent = 1, Noticeboard = 0, AboutMe = 0 });
                    myprofile.Tiers.Add(new Tier { Level = 2, Email = 1, Phone = 1, Mobile = 0, Address = 0, Education = 1, Publication = 1, Patent = 1, Noticeboard = 1, AboutMe = 1 });
                    myprofile.Tiers.Add(new Tier { Level = 3, Email = 1, Phone = 1, Mobile = 1, Address = 1, Education = 1, Publication = 1, Patent = 1, Noticeboard = 1, AboutMe = 1 });
                    followPeersDB.UserProfiles.Add(myprofile);
                    followPeersDB.SaveChanges();


                    return RedirectToAction("Index", "Profile", new { id = myprofile.UserProfileId });
                    //return RedirectToAction("Index", "Home");
                }
                else
                {
                    ModelState.AddModelError("", ErrorCodeToString(createStatus));
                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }

        //
        // GET: /Account/ChangePassword

        [Authorize]
        public ActionResult ChangePassword()
        {
            return View();
        }

        //
        // POST: /Account/ChangePassword

        [Authorize]
        [HttpPost]
        public ActionResult ChangePassword(ChangePasswordModel model)
        {
            if (ModelState.IsValid)
            {

                // ChangePassword will throw an exception rather
                // than return false in certain failure scenarios.
                bool changePasswordSucceeded;
                try
                {
                    MembershipUser currentUser = Membership.GetUser(User.Identity.Name, true /* userIsOnline */);
                    changePasswordSucceeded = currentUser.ChangePassword(model.OldPassword, model.NewPassword);
                }
                catch (Exception)
                {
                    changePasswordSucceeded = false;
                }

                if (changePasswordSucceeded)
                {
                    return RedirectToAction("ChangePasswordSuccess");
                }
                else
                {
                    ModelState.AddModelError("", "The current password is incorrect or the new password is invalid.");
                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }

        //
        // GET: /Account/ChangePasswordSuccess

        public ActionResult ChangePasswordSuccess()
        {
            return View();
        }

        #region Status Codes
        private static string ErrorCodeToString(MembershipCreateStatus createStatus)
        {
            // See http://go.microsoft.com/fwlink/?LinkID=177550 for
            // a full list of status codes.
            switch (createStatus)
            {
                case MembershipCreateStatus.DuplicateUserName:
                    return "User name already exists. Please enter a different user name.";

                case MembershipCreateStatus.DuplicateEmail:
                    return "A user name for that e-mail address already exists. Please enter a different e-mail address.";

                case MembershipCreateStatus.InvalidPassword:
                    return "The password provided is invalid. Please enter a valid password value.";

                case MembershipCreateStatus.InvalidEmail:
                    return "The e-mail address provided is invalid. Please check the value and try again.";

                case MembershipCreateStatus.InvalidAnswer:
                    return "The password retrieval answer provided is invalid. Please check the value and try again.";

                case MembershipCreateStatus.InvalidQuestion:
                    return "The password retrieval question provided is invalid. Please check the value and try again.";

                case MembershipCreateStatus.InvalidUserName:
                    return "The user name provided is invalid. Please check the value and try again.";

                case MembershipCreateStatus.ProviderError:
                    return "The authentication provider returned an error. Please verify your entry and try again. If the problem persists, please contact your system administrator.";

                case MembershipCreateStatus.UserRejected:
                    return "The user creation request has been canceled. Please verify your entry and try again. If the problem persists, please contact your system administrator.";

                default:
                    return "An unknown error occurred. Please verify your entry and try again. If the problem persists, please contact your system administrator.";
            }
        }
        #endregion
    }
}
